How to remove a blog

For experimental purposes I created a new blog on WordPress (free version) but wish to get rid of it. There seems to be no obvious way to simply delete. At present I have 4 blogs listed - two of them are used regularly. One is an old abandoned blog and then this experimental one which I wish to have removed from the list. Help!

Please bear in mind that once deleted, that site's WordPress.com URL will become permanently unavailable for future use. If you feel that you might need that URL again in the future, you might want to choose one of the other options listed on the the page linked above.

Please let me know if you have further questions or if anything is unclear.